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CVE-2021-28038

Status Candidate

Overview

An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.

Related Files

Ubuntu Security Notice USN-4984-1
Posted Jun 4, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4984-1 - Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service. It was discovered that the Realtek RTL8188EU Wireless device driver in the Linux kernel did not properly validate ssid lengths in some situations. An attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2021-28038, CVE-2021-28660, CVE-2021-28688, CVE-2021-28950, CVE-2021-28952, CVE-2021-28964, CVE-2021-28971, CVE-2021-28972, CVE-2021-29647, CVE-2021-30002, CVE-2021-31916, CVE-2021-33033, CVE-2021-3483
MD5 | ef9bb22f3bfa67465b7e2c92a0636737
Ubuntu Security Notice USN-4945-2
Posted May 19, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4945-2 - USN-4945-1 fixed vulnerabilities in the Linux kernel for Ubuntu 20.04 LTS and Ubuntu 18.04 LTS. This update provides the corresponding Linux kernel updates targeted specifically for Raspberry Pi devices in those same Ubuntu Releases. It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions in some situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-25639, CVE-2021-28038, CVE-2021-28375, CVE-2021-28660, CVE-2021-29265, CVE-2021-29650, CVE-2021-30002
MD5 | bb177fea27f25a1a0200917a65970aef
Ubuntu Security Notice USN-4946-1
Posted May 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4946-1 - It was discovered that the DRM subsystem in the Linux kernel contained double-free vulnerabilities. A privileged attacker could possibly use this to cause a denial of service or possibly execute arbitrary code. Olivier Benjamin, Norbert Manthey, Martin Mazein, and Jan H. Schoenherr discovered that the Xen paravirtualization backend in the Linux kernel did not properly propagate errors to frontend drivers in some situations. An attacker in a guest VM could possibly use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2021-20292, CVE-2021-26930, CVE-2021-26931, CVE-2021-28038, CVE-2021-28688, CVE-2021-29264, CVE-2021-29265, CVE-2021-29650, CVE-2021-30002
MD5 | 50ba1d23637af4726e875b2987d5e252
Ubuntu Security Notice USN-4945-1
Posted May 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4945-1 - It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions in some situations. A local attacker could use this to cause a denial of service. Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25639, CVE-2021-28038, CVE-2021-28375, CVE-2021-28660, CVE-2021-29265, CVE-2021-29650, CVE-2021-30002
MD5 | cf8a7827b1c14f7183d67f60c0835edb
Ubuntu Security Notice USN-4911-1
Posted Apr 13, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4911-1 - It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions in some situations. A local attacker could use this to cause a denial of service. Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25639, CVE-2021-28038, CVE-2021-28375, CVE-2021-28950
MD5 | 17a8d3f50ac352ee2cdc57eebb059c80
Ubuntu Security Notice USN-4904-1
Posted Apr 13, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4904-1 - Ben Harris discovered that the Linux kernel would strip extended privilege attributes of files when performing a failed unprivileged system call. A local attacker could use this to cause a denial of service. Andrey Konovalov discovered that the video4linux driver for Hauppauge HD PVR USB devices in the Linux kernel did not properly handle some error conditions. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-1350, CVE-2017-16644, CVE-2017-5967, CVE-2018-13095, CVE-2019-16231, CVE-2019-16232, CVE-2019-19061, CVE-2021-20261, CVE-2021-26930, CVE-2021-26931, CVE-2021-28038
MD5 | 6b027bc7155bd5704a852358599f76f9
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